Verifying snapshots with signify

Wynn Wolf Arbor

I use the signify tool to cryptographically sign all software downloads you will find on this site.

Whilst you technically don't need signify to verify the integrity of downloaded files, I strongly recommend using it to also verify the signature. A portable version of the tool is available here.

Obtaining the signature and checksum

If you decide to use signify to verify downloaded files, you need to obtain the detached signature linked on the respective project page and the public release key (see below). Otherwise, you only need to fetch the checksum.

Obtaining the public key

To fully verify a download with signify, first obtain my public key. I keep a copy of the same key on DNS, feel free to verify it therewith:

$ drill TXT

Another copy of the key exists on the freenode IRC servers, in my taxonomy data:

/msg NickServ taxonomy wynn

You may want to keep the public key saved on your system for future verifications.

Verification with signify

Once you have downloaded my public key, run the following to verify your download:

$ signify -C -p -x <snapshot>.SHA256.sig
Signature Verified
<snapshot>: OK

Verification with sha256sum

Alternatively, if you don't want to install signify, you can use the sha256sum tool to only verify the integrity of the download:

$ sha256sum -c <snapshot>.SHA256
<snapshot>: OK